package lab02.Test36;

/**
 * Created by Administrator on 2017/11/9.
 */
public class Postgraduate extends Student {
    @Override
    String calGrade(){
        double avg=calAverage();
        if (avg>=90&&avg<100)
            grade="优秀";
        else if(avg>=80&&avg<90)
            grade="良好";
        else if(avg>=70&&avg<80)
            grade="一般";
        else if(avg>=60&&avg<70)
            grade="及格";
        else
            grade="不及格";
        return grade;
    }
}
